Swift PNG to WebP

Convert PNG images to WebP and cut file sizes by 25-35% with no visible quality loss. WebP is the modern image format used by Google, Facebook, and most major websites — faster loading, lower bandwidth, better Core Web Vitals scores. Perfect for web developers, bloggers, and anyone optimizing images for the web. This tool processes everything in your browser — no upload, no limits, no signup.

How much smaller are WebP files vs PNG?

WebP typically produces files 25-35% smaller than PNG for lossless images, and 25-50% smaller with lossy compression. A 1MB PNG might become 650-750KB as lossless WebP, or 300-500KB with quality 85.

Does WebP support transparency?

Yes. WebP fully supports alpha channel transparency, just like PNG. Your transparent PNGs will retain their transparency when converted to WebP.

Is WebP good for websites?

WebP is the recommended image format for modern websites. It's supported by all major browsers (Chrome, Firefox, Safari, Edge) and produces significantly smaller files than PNG or JPG. Google's PageSpeed Insights specifically recommends WebP for better Core Web Vitals scores.

What quality setting should I use?

For photographs, quality 80-85 gives excellent results with significant size reduction. For graphics, logos, or images with text, use quality 90-100 or consider lossless WebP to avoid compression artifacts.